Deformation and annealing textures of equal-channel angular pressed 1050 Al alloy strips

Abstract

A study has been made of the deformation and recrystallization textures of 1050 Al alloy strips deformed by equal-channel angular pressing (ECAP) with oblique angles of 90 degrees and 120 degrees, varied pressing numbers, and shear directions. The deformation texture is most influenced by the last pressing pass. The deformation textures vary along the thickness, with the top surface layer developing textures closest to the ideal shear texture consisting of the {111} < 112 >, {111} < 110 >, and {001} < 110 > orientations, while the bottom surface layer most deviated from the ideal shear texture. The annealing textures of sheets can be approximated by weakened deformation texture plus the {001} < 100 > texture, whose density is roughly proportional to the density of the {001} < 100 > component in the deformation texture. To understand the behaviors, the deformation was analyzed by finite element method, and the annealing textures were discussed based on the strain-energy-release-maximization model. (C) 2008 Elsevier B.V. All rights reserved.